Java tutorial
/* * This file ("TileEntityInventoryBase.java") is part of the Actually Additions mod for Minecraft. * It is created and owned by Ellpeck and distributed * under the Actually Additions License to be found at * http://ellpeck.de/actaddlicense * View the source code at https://github.com/Ellpeck/ActuallyAdditions * * 2015-2016 Ellpeck */ package de.ellpeck.actuallyadditions.mod.tile; import de.ellpeck.actuallyadditions.mod.util.ItemStackHandlerCustom; import de.ellpeck.actuallyadditions.mod.util.StackUtil; import net.minecraft.item.ItemStack; import net.minecraft.nbt.NBTTagCompound; import net.minecraft.nbt.NBTTagList; import net.minecraft.util.EnumFacing; import net.minecraft.util.math.MathHelper; import net.minecraftforge.items.IItemHandler; import net.minecraftforge.items.IItemHandlerModifiable; import net.minecraftforge.items.ItemHandlerHelper; import net.minecraftforge.items.ItemStackHandler; public abstract class TileEntityInventoryBase extends TileEntityBase { public final ItemStackHandlerCustom slots; public TileEntityInventoryBase(int slots, String name) { super(name); this.slots = new ItemStackHandlerCustom(slots) { @Override public boolean canInsert(ItemStack stack, int slot) { return TileEntityInventoryBase.this.isItemValidForSlot(slot, stack); } @Override public boolean canExtract(ItemStack stack, int slot) { return TileEntityInventoryBase.this.canExtractItem(slot, stack); } @Override public int getSlotLimit(int slot) { return TileEntityInventoryBase.this.getMaxStackSizePerSlot(slot); } @Override protected void onContentsChanged(int slot) { super.onContentsChanged(slot); TileEntityInventoryBase.this.markDirty(); } }; } public static void saveSlots(IItemHandler slots, NBTTagCompound compound) { if (slots != null && slots.getSlots() > 0) { NBTTagList tagList = new NBTTagList(); for (int i = 0; i < slots.getSlots(); i++) { ItemStack slot = slots.getStackInSlot(i); NBTTagCompound tagCompound = new NBTTagCompound(); if (StackUtil.isValid(slot)) { slot.writeToNBT(tagCompound); } tagList.appendTag(tagCompound); } compound.setTag("Items", tagList); } } public static void loadSlots(IItemHandlerModifiable slots, NBTTagCompound compound) { if (slots != null && slots.getSlots() > 0) { NBTTagList tagList = compound.getTagList("Items", 10); for (int i = 0; i < slots.getSlots(); i++) { NBTTagCompound tagCompound = tagList.getCompoundTagAt(i); slots.setStackInSlot(i, tagCompound != null && tagCompound.hasKey("id") ? new ItemStack(tagCompound) : StackUtil.getNull()); } } } @Override public void writeSyncableNBT(NBTTagCompound compound, NBTType type) { super.writeSyncableNBT(compound, type); if (type == NBTType.SAVE_TILE || (type == NBTType.SYNC && this.shouldSyncSlots())) { saveSlots(this.slots, compound); } } @Override public IItemHandler getItemHandler(EnumFacing facing) { return this.slots; } public boolean isItemValidForSlot(int slot, ItemStack stack) { return true; } public boolean canExtractItem(int slot, ItemStack stack) { return true; } public int getMaxStackSizePerSlot(int slot) { return 64; } public boolean shouldSyncSlots() { return false; } @Override public int getComparatorStrength() { return ItemHandlerHelper.calcRedstoneFromInventory(this.slots); } @Override public void readSyncableNBT(NBTTagCompound compound, NBTType type) { super.readSyncableNBT(compound, type); if (type == NBTType.SAVE_TILE || (type == NBTType.SYNC && this.shouldSyncSlots())) { loadSlots(this.slots, compound); } } }